When first to the market, the computer software was not a success due to its complexity in operation. A．introducingB．being introducedC．introducedD．to be introduced 题目和参考答案——青夏教育精英家教网—

When first __________ to the market, the computer software was not a success due to its complexity in operation.

A．introducing	B．being introduced
C．introduced	D．to be introduced

本题考查非谓语动词。句中逻辑主语为the computer software，与introduce的关系为被动关系，故用过去分词，选C。

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